feat: refactor 30+ skills to Anthropic progressive disclosure pattern

- All SKILL.md files now <500 lines (avg reduction 69%)
- Detailed content extracted to references/ subdirectories
- Frontmatter standardised: only name + description (Anthropic standard)
- New skills: brand-guidelines, spec-coauthor, report-templates, skill-creator
- Design skills: anti-slop guidelines, premium-proposals reference
- Removed non-standard frontmatter fields (triggers, version, author, category)

Plugins affected: infraestrutura, marketing, dev-tools, crm-ops, gestao,
core-tools, negocio, perfex-dev, wordpress, design-media

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

project-manager/skills/brainstorm/SKILL.md

@@ -1,19 +1,6 @@
 ---
 name: brainstorm
-description: >
-  Brainstorming estruturado v1.1. Explora ideias de multiplos angulos antes de criar spec.
-  Consulta NotebookLM (Gemini 2.5 + conhecimento curado) e Dify KB para perspectivas de especialistas.
-  Use when "brainstorm", "ideia", "pensar", "explorar", "debater",
-  "o que achas", "como farias", "vale a pena", "pros e contras".
-author: Descomplicar® Crescimento Digital
-version: 1.1.0
-quality_score: 72
-user_invocable: true
-category: productivity
-tags: [brainstorm, ideacao, debate, explorar, dify, notebooklm, especialistas, decisao]
-desk_project: 65
-allowed-tools: Read, Write, Glob, Grep, mcp__dify-kb, mcp__mcp-time, mcp__memory-supabase, mcp__notebooklm
-mcps: dify-kb, mcp-time, memory-supabase, notebooklm
+description: Brainstorming estruturado que explora ideias de múltiplos ângulos antes de criar spec. Consulta NotebookLM e Dify KB para perspectivas de especialistas.
 ---
 
 # /brainstorm v1.1 - Ideacao Estruturada